A roll film negative. On board the submarine Sealion (1959) towards the end of a long refit at Portsmouth. The photographer is in the auxiliary machinery space between 62 and 68 stations below the main flat looking aft and to port on the port side at 63 station showing telemotor pump No. 2 with its V-belt drive on the left. Against the port side of the boat is the telemotor pump starter panel above a miscellaneous electrical circuits junction box and a battery cooling H.Ex handwheel.